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- /*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #ifndef GrTessellator_DEFINED
- #define GrTessellator_DEFINED
- #include "include/core/SkPoint.h"
- #include "include/private/SkColorData.h"
- #include "src/gpu/GrColor.h"
- class SkPath;
- struct SkRect;
- /**
- * Provides utility functions for converting paths to a collection of triangles.
- */
- #define TESSELLATOR_WIREFRAME 0
- namespace GrTessellator {
- class VertexAllocator {
- public:
- VertexAllocator(size_t stride) : fStride(stride) {}
- virtual ~VertexAllocator() {}
- virtual void* lock(int vertexCount) = 0;
- virtual void unlock(int actualCount) = 0;
- size_t stride() const { return fStride; }
- private:
- size_t fStride;
- };
- struct WindingVertex {
- SkPoint fPos;
- int fWinding;
- };
- // Triangulates a path to an array of vertices. Each triangle is represented as a set of three
- // WindingVertex entries, each of which contains the position and winding count (which is the same
- // for all three vertices of a triangle). The 'verts' out parameter is set to point to the resultant
- // vertex array. CALLER IS RESPONSIBLE for deleting this buffer to avoid a memory leak!
- int PathToVertices(const SkPath& path, SkScalar tolerance, const SkRect& clipBounds,
- WindingVertex** verts);
- int PathToTriangles(const SkPath& path, SkScalar tolerance, const SkRect& clipBounds,
- VertexAllocator*, bool antialias, bool *isLinear);
- }
- #endif
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